A Pennsylvania schoolteacher was shot to death in her mother’s driveway on Mother’s Day.

Authorities say 32-year-old Rachael DelTondo had gone to an ice cream shop on Sunday night and had just returned to the home in Aliquippa when she was shot multiple times. DelTondo died at the scene, 22 miles northwest of Pittsburgh.

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According to WTAE, investigators took a cellphone to be downloaded and checked for evidence.

"We are working with every resource we have," Beaver County District Attorney David Lozier said. "We're getting video cameras, we are downloading information, we are interviewing witnesses. We are doing everything we can."

Investigators have collected several shell casings, all from the same caliber weapon.

The Beaver County Times reports neighbors heard up to 12 shots fired. Lozier said he believes the shots were fired at close range.

“That’s a very stable neighborhood,” he said. “This is very out of anyone’s expectations for the neighborhood.”

Lozier told KDKA that investigators believe DelTondo's slaying was a "crime of passion," but did not elaborate. Lozier would not say if police have identified a suspect, but said investigators believe she knew her attacker.

DelTondo was suspended last November from the Pennsylvania Cyber Charter School. The suspension came after school officials received an anonymous email containing a February 2016 police report stating DelTondo had been found in a parked car with a 17-year-old former student. No charges were filed.

"It's shameful that this woman was painted with a police report that had been written that did not result in criminal charges," Lozier said. "There was a personal vendetta against her at the time."

Pennsylvania Cyber Charter School CEO Brian Hayden released the following statement:

"We were saddened to learn of the tragic death of Rachel DelTondo, apparently the result of a violent incident in the city of Aliquippa. We have no additional information beyond what is being reported by local media. We express our sympathy to her family and coworkers and will support them in any way possible in the weeks and months ahead as they mourn her passing."